Window structure



2 Sheets-Sheet l April 3, 1956 E. A. WESTMAN WINDOW STRUCTURE FiledJune. 5, 1952 M R a a M m M a, NE i A a II e I RN\ 4 M /W 56 H a m Z 1%M M a a /|r i MM 44\ 4 C r F a W I I I l 2L 4 l J a A i4 April 3, 1956E. A. WESTMAN WINDOW STRUCTURE Filed June 5, 1952 2 Sheets-Sheet 2INVENTOR.

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United States Patent WINDOW STRUCTURE Elmer A. Westman, Fenton, Mich.,assignor to Industrial Machine Tool Company, Fenton, Mich., acorporation of Michigan Application June 5, 1952, Serial No. 291,849 2Claims. (Cl. 20-42) This invention relates to a window structure andparticularly to a window construction of the awning type of swingablesash. In the awning type of window one or more sash elements arepivotally mounted between the side frame members of the window forswingable movement of the sash. The sash are swingably actuated byoperating mechanism which commonly includes a crank actuated rotatableshaft coupled by linkage with the sash to swing the sash upon rotationof the shaft.

As conventionally constructed, the swingable sash open simultaneously.If the window comprises upper and lower sash, both of these sash swingopen at the same It is frequently desirable to be able to open merelythe lower sash for a slight distance without opening the upper sash.This invention relates to the provision of operating mechanism which isso constructed and so coupled with the sash that upon initiation of theopening movement the lower sash will swing partially open before theupper sash is opened. Following the initial partial opening movement ofthe lower sash both sash elements swing open simultaneously.

An object of this invention is to provide a window structure of theawning type having upper and lower swingable sash with operatingmechanism so constructed and coupled with the sash that the lower sashmay be partially opened without any resulting opening of the upper sashand following such partial opening movement both sash maybe swungsimultaneously to the open position.

Another object is the provision of a window structure of the characterdescribed wherein there is a lost motion connection in the linkagebetween the sash and the shaft which permits actuation of that part ofthe linkage which swings the lower sash prior to actuation of that partof the linkage which swings the upper sash and the construction is suchthat when both sash are opened they are held in the open positionagainst rattle or looseness notwithstanding the provision of the lostmotion connection.

A further object is the provision of mechanism of the character setforth which is simple, sturdy, inexpensive and easily operable.

Other objects, advantages and meritorious features will more fullyappear from the following description, claims and accompanying drawings,wherein:

Fig. l is a front elevation of a window structure embodying theinvention and partly broken away to illustrate the working parts of theoperating mechanism;

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is a vertical sectional view taken on the same line as that ofFig. 2, but showing the lower window sash partially open in solid lineand showing in dotted outline both the lower and the upper sash in theopen position;

Fig. 4 is a fragmentary sectional view taken on the line 4-4 of Fig. 1;

Fig. 5 is a sectional view taken on the line 5--5 of Fig. 1;

Patented Apr. 3, 19 56 Fig. 6 is a fragmentary sectional view throughone end of the link which forms part of the lost motion connectionbetween the two sections of a slide bar.

In the window structure illustrated there are two side frame memberswhich are indicated as 10. These side frame members are complementaryand are disposed in opposed spaced apart relationship being connected atthe top by a header 12 and at the bottom by a bottom cross member 14.Each side frame member is channel-shaped in cross section, asillustrated in Fig. -5, and its side walls are turned outwardlyproviding flanges 11, as shown in Fig. 5. An upper sash indicatedgenerally as U and a lower sash indicated generally as L are pivot-allymounted between the side frame members. Each sash isindependentlyswingably pivoted between the side frame members upon a pair of links.These links are indicated as 16. Each link consists of two end sectionswhich are adjustably extensibly connected together so as to vary thelength of each link. The links shown are those which are described andclaimed in applicants application Serial No. 218,031, filed March 28,1951, now Patent No. 2,688,779, patented September 14, 1954, though anyadjustable type of link might be used and such forms no part of theinstant invention. Each link is pivoted at one end as at 18 to its sashspaced from the top of the sash and is pivoted at the opposite end as at20 to a side frame member 10. The pivotal connection 20 is made with abracket portion 22 which bracket 22 is secured to the side frame'memberand also serves to form a guide for a slide bar hereinafter described.Each sash swings upon its pair of links as a fulcrum with respect to thewindow frame. The upper sash has a depending flange portion 23 whichoverhangs the lower sash to form a weather seal therealong and the lowersash has a depending flange portion 25 which overhangs the bottom crossframe member for a similar purpose.

The operating mechanism is provided to swing the sash and this operatingmechanism includes a shaft 24 which extends transversely across thebottom of the window frame and is rotatably mounted for rotation by ahand crank 26. This hand crank is connected by gearing 28 with the leverarm 30, which arm is pivoted to a support as at 32. The outer end of thearm is connected by a link 34 with an arm 36 fixed to the shaft 24. Theouter end of the arm 36 is connected by a long link 38 with a slide barwhich'slide bar is coupledwith the sash I to swing the sash. A housing35 surrounds the operating linkage, as shown, and is secured to theframe by screws 37, or the like.

A pair of slide bars are provided for each window frame, one for eachside frame member. Each slide bar is mounted within the channel of itsframe member to extend along the inside thereof, as shown. Ashereinafter stated, the bracket 22 forms a guide for the slide bar, butthe frame member itself is provided with an inwardly projecting portion21, as shown in Fig. 5, which also serves to guide the slide bar. Eachbar is divided into upper and lower sections, as illustrated. Each uppersection is indicated by the numeral 42. The two lower sections 40 arepivoted to the lower sash L, as shown. Each lower sash L has a pair ofbrackets 44 secured thereto adjacent its top margin. The ends of thesebrackets are pivotally coupled by pivots 46 to the lower sections 40 ofthe slide bars. Upon rotation of the crank 26 the slide bars arereciprocated. When the crank is rotated to lower the lower sections 40of the two slide bars the top of the lower sash will be pulleddownwardly and this will swing the bottom of the lower sash outwardly,all as shown in dotted line in Fig. 3.

The two lower sections 40 of the two slide bars are connected with uppersections 42 of the two slide bars by lost motion linkage. This lostmotion linkage comprises 3 a link 59 which is shown as provided adjacenteach end with a slot 52. A pin 54 is carried by each slide bar sectionand extends through the slot 52, all as shown in Figs. 2 and 3. In :Fig.2, the sash are shown as closed and the pins 54am disposed at theadjacent ends of the slots 52 in the link 50. When the lower sash ispartially opened and the lower sections 40 of the slide bars are drawndownwardly the pins move to the remote ends of the slots 52 before theupper sections of the slide bars pick up the movement of the lowersections and move therewith. This lost motion permits independentpartial opening of the lower sash before the upper sash is opened. Oncethe lost motion is taken up continued opening movementirnparted from thecrank will now swing the upper sash and the same will swingsimultaneously with the lower sash.

In order that the upper sash when swung to an open position will notrattle or move up and down in a wind, means is provided to restrain theaccidental play of the lost motion connection. The link 59 is proareadily serve to withdraw the pin from the clip 56 so as to permit thepin to occupy the positions shown in Fig. 4 when the sash are closed.

What I claim is:

1. In a window structure, a window frame having a pair 'of'opposedcomplementary spaced apart side frame members, upper and lower sashestherebetween, a pair of links for each sash, one link of each pairpivoted at one end to a side frame member and pivoted at the oppositeend to the adjacent side of a sash spaced below the top of the sash, theother link of the pair correspondingly pivoted at one end to the otherside frame member and correspondingly pivoted at its opposite end to itsadjacent side of the sash, a pair of slide bars, one for each side framemember, each slide bar disposed along its side frame member forlengthwise movement therealong, each bar comprising an upper section anda lower section, a lost motion linkage coupling said two sectionstogether comprising a link for each bar, each link overlapping theadjacent ends of the upper section and the lower section of the bar withwhich it is associated, the upper end of each link coupled through a pinand slot lost motion connection with the lower end of the upper barsection, the lower end of each link coupled through a pin and slot lostmotion connection with the upper end of the lower bar section, the uppersash pivotally coupled at the top to the upper sections of the two bars,the lower sash pivotally coupled at the top to the lower sections of thetwo bars, and an operating mechanism coupled with the lower ends of thetwo bars to move the bars downwardly to swing the sashes towardan openposition and to move the bars upwardly to swing the sashes toward aclosed position, said pin and slot lost motion connection of each end ofeach link with the adjacent ends of the upper section and the lowersection of its bar being such that the two pins are disposed in adjacentends of the slot when both bar sections are moved upwardly and intoopposite ends of the two slots when both bar sections are moveddownwardly.

2. In a window structure, a window frame having a pair of opposedcomplementary spaced apartside frame members, upper and lower sashestherebetween, a pair of links for each sash, one link of eachpairpivotedat one end to a side frame member and pivoted at the opposite end to theadjacent side of a sash spaced below the top of the sash, the other linkof the pair correspondingly pivoted at one end to the other side framemember and correspondingly pivoted at its opposite end to its-adjacentside of the sash, a pair of slide bars, one for each side frame member,each slide bar disposed along its side frame member for lengthwisemovement therealong, each bar comprising an upper section and a lowersection, a lost motion linkage coupling said two sections togethercomprising a link for each bar, each link overlapping the adjacent endsof the upper section-and the lower section of the bar with which it isassociated, the upper end of each link coupled through a pin and slotlost motion connection with the lower end of the upper bar section, thelower end of each link coupled through-a pin and slot lost motionconnection with the upper end of the lower bar section, the upper sashpivotally coupled at-the top to the upper sections of the two bars, thelower sash pivotally coupled at the top to the lower sections of the twobars, and an operating mechanism coupled with the lower ends of the twobars to move the bars downwardly to swing the sashes toward an openposition and to move the bars upwardly to swing the sashes toward aclosed position, each pin and slot lost motion connection of each end ofeach link with the adjacent ends of the upper section and the lowersection of its bar being such that the two pins are disposed in adjacentends of the slot when both bar sections are moved upwardly and intoopposite ends of the two slots when both bar sections are moveddownwardly, the upper slot in each link being provided at its upper endwith a spring clip mounted therein, said clip adapted to releasably gripthe pin in the slot when the pin is moved into the upper end of theslot.

References Cited in the file of this patent UNITED STATES PATENTS1,659,103 Hauser Feh. 14, 1928 2,090,133 Larson Aug. 17, 1937 2,293,944Moseley Aug. 25, 1942 2,313,827 Larson Mar. 16, 1.943 2,383,912 GargiuloAug. 28, 1945' 2,444,3ll Reynaud June 29, 1948 2,478,044 'Gargiulo Aug.2, 1949 2,478,061 Stearns Aug. 2, 1949

